Holder for riveting-tools.



C. G. PEPPER.

HOLDER FQR RIVETING TOOLS. APPLICATION FILED MAR. 21. 1918.

Patented Nov. 5, 1918.

c. a. PEPPER. HOLDER FOR RIVETING TOOLS- APPLICATION HLED MMLZT, I918.

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Be it known that I, Gnrrrorm G. PEPPER, a citizen of the United States, residing at Pittsburg, in the county of Crawford and State of Kansas, have invented certain new and useful Improvements in Holders for Riveting-Tools, oi' which the following is a specification, reference being had to the ac companying drawin'gs'l This invent-ion relates to pneumatic riveting 7 devices, and particularly to means whereby the hammers may beheld to the work or whereby an anvil may be held against the head of the rivet.

The general object of this invention is the provision of a holder for riveting hammers provided with relatively strong electro-magnets which will act to hold the-hammer to the work and support it.

A further object is the provision in con.- nection with the electro-magnets which engage the work, of springs and yokes, the yokes embracing the pneumatic riveter and the springs engaging the yokesso as to give a certain amount of necessary play or movement to the riveter or hammer.

A further object are provide a holder of the character described, which mayualso be used forholding an" anvil with the usual rivet snap against therivet head.

The advantage of this deviceis that it permits one man to operate the hammer ill". stead of two, as is at present the case.

Other objects will appear-in the course (it the following descriptionu My invention is illustrated in the accompanying drawings, wherein Figure 1 is an elevation of a pneumatlc hammer equipped with my improved holding device;

Fig. 2"is a section onthe line 2-2 of Fi 1; i

Fig. 3 is an elevation of an anvil with my improved means for holdingit to the work.

Fig. 4 is an elevationxshow'inghow my improved hammer and anvil holder are to be llSdJ In Fig. 1, it show a pneumatic riveter of ordinary type and designated 10. ll do not show the details of this pneumatic riveter, as riveting hammers of this character are well known and form no; part of my inven tion. The casing of the riveter is provided intermediate its ends with a shoulder or flange 11. My holder comprises yoke des ignated generally 12 and formed of two Specification of Letters Patent.

Patented new. iets.

Ap i'i'catitn filed Marcher, 1918. Serial No. 225,019.

semi-circular steel bands 13, approximately 2 wide and t in thickness; these bands be- 111g joined to each other at l t by bolts or other suitable means and being provided at their joined ends with the hooks 15, the bills of the hooks extending forward and inward. Used in connection with the yolre is a: yoke .16 or brace which is also formed to loosely embrace or surround the casing of the pneumatic riveter adjacent its Work on gaging end, and this brace or yoke 16 is formed with two circular extensions 1? disposed to engage around and support the electro-magnets 18 which may be of any suitable character, but are intended to exert arelatively great pull. Eye-bolts 19 are engaged with the cores of these magnets and engaged with these eye-bolts are the coiled contractile springs 20 having rings 21 at their ends which in turn are engaged with the bills of the hooks 15.

The wires 22 from the electro-magnets eX- tend to a switch box 23 and from the switch box extends the wire 24: which connects with any source of electricity. The switch has is provided with a switch whereby an electric circuit may be established through the magnets or out Oh. Any suitable switch may be used for this purpose.

Preferably, in order to provide for the attachment of the eye-loolts 19, the core o't' e: h

electro-magnet is bored out, the borebeiiig 1%" wide at the inner end and 1 inch in dinnieter at the top and 1 deep with ordinary sizes of magnets and this space to be filled with non-conducting metal, such as babbitt.

Ahole is then drilled into this filling or plu 25, this hole being interiorly screw-threadcd and the eye-bolts 19 engaging with these screw-threads.

Where this holder is used in coimection with a pneumatic riveter the yoke 12 dieposed around the body of the rivetcr adja cent to the flange 11 and bearing thereagainst with the yoke' l6 engagingloosely around that portion of the riveter adjacent the rivet to bedriven. Under these circumstances. whenthe magnets 18 are energized they will magnetically engage with the work A and the hammer may then be operated in the ordinary or usual manner to cause the rivet snap 26 to overturn the head of the rivet B. When the holder is in place with the magnets engaged with the work, the springs 20 may be expanded by drawing the pneumatic riveter outward so as to permit the head of the piston or hammer of the riveter to be disposed against the extremity of the rivet. These springs will then cause the body of the riveter to move inward as the rivet is overturned.

When it is desired to use my yoke and magnets as a holder on, that is, to provide means for holding an anvil against the head of the rivet while its opposite end is being turned down, I dispose within the yoke 12, an anvil consisting of a bar of iron or other metal designated 27. In ordinary practice this metal bar will be about 211- in diameter and have a handle at one end. This bar is also provided with a shoulder 28 and a socket for the shank of the rivet snap 29. This rivet snap fits over the rivet head and is used for the purpose of correctly forming and finishing the rivet head. By using two of these holding devices, one holding the anvil and the other the hammer, it is obvious that the rivet may be driven or overturned by a hammer held in position by means of one yoke and the anvil be used to engage the head of the rivet on the other side of the rivet or work.

By using my device only one man is needed to operate the hammer or pneumatic riveter on one side of the work and one man to operate the anvil on the opposite side of the work thus using only two men where to-day four men are ordinarily used, two to operate the riveter and two to support and hold the anvil. It will be seen that the magnets hold the anvil up to place instead of it requiring two men pushing with all their strength against the riveter to hold it to the work. Furthermore my device relieves the operator from much of the vibrations and nerve-racking strain incident to the operation of a pneumatic riveter.

Having described my invention, what I claim is:

1. A holder for riveting tools including an electro magnet, a yoke adapted to operatively engage the tool, and a spring disposed between the electro-magnet and the yoke urging the yoke toward the magnet when the spring is under tension.

2. The combination with a riveting tool including an outer casing, of a plurality of magnets coacting with the casing and adapt ed to engage the work and resiliently yieldable connections between the electro-magnets Copies of this patentmay-be obtained for and the riveting tool urging the riveting tool against the work but permitting it to be shifted outward from thework and relative to the electro-magnet.

3. A device of the character described including a pair of electro-magnets, a yoke connecting said magnets and adapted to engage around a riveting tool, a second yoke adapted to engage around the riveting tool and abut against a portion thereof, and contractile springs disposed between the electromagnets and the second named yoke and operatively engaging the same. 4. A device of the character described including a plurality of electro-magnets adapted to engage the Work, a yoke operatively engaging the electro-magnets and formed to embrace a riveting tool, a second yoke formed to embrace the riveting tool and to abut against a portion thereof, said second named yoke having hooks at its ends, and contractile springs operatively engaging the cores of the magnets and the hooks and yieldingly resisting outward movement of the riveting tool away from the work.

5. The combination with a riveting tool having a shoulder intermediate its ends, of a yoke surrounding the riveting tool and abutting against the shoulder and having hooks at its ends, a second yoke operatively engaging the riveting tool, a plurality of electromagnets operatively engaged with the second named hook and adapted to engage the work, a pair of contractile springs operatively engaged with said magnets and with said. hooks, and electrical connections from the magnets including a switch.

6. A device of the character described including a plurality of electro-magnets each having a core, a dove-tailed plug inserted in each core and formed of non-conducting metal, eye-bolts engaging said cores, a yoke adapted to embrace a riveting tool and operatively embracing the magnets, a second yoke formed to embrace the riveting tool, springs engaging said eye bolts and said hooks, and electrical connections from the magnets including a switch.

In testimony whereof I hereunto afiix my signature in the presence of two witnesses.

CLIFFORD G. PEPPER. Witnesses:

R. L. ALLEN, BERT W. BUSSEY.

five cents each, by addressing the Commissioner of Patents, Washington, D. G. I 

